I will limp for two reasons Headsup...
First is I am confident that my post flop play is better than the player I am up against and they have tells
such as checking the flop and betting the turn at a high percentage,betting when they hit and folding when they dont have it etc.
Second they over react to a open limp and I can take advantage that way.
They see a limp and bet pot or 5xbet and I end up with more commitment from them to the pot then I would if I opened with a std 3xbb.
Sometimes that same player will cbet 100% of flops due to the size and that sort of player rarely adjusts in time.
When they do adjust it is in the extreme the other way where you can get them to fold turn on a 1/4 pot bet.
It is also not early on to establish image that you can exploit later or very soon after.